最近項目中用到了nginx,後臺用的是Java, 發現有一個請求後臺處理操過了1分鐘,結果請求Status Code爲504 Gateway Time-out.
理解了下nginx 所有timeout相關的配置,如下:
keepalive_timeout
HTTP 有一個 KeepAlive 模式,它告訴 webserver 在處理完一個請求後保持這個 TCP 連接的打開狀態。若接收到來自客戶端的其它請求,服務端會利用這個未被關閉的連接,而不需要再建立一個連接。
http keep-alive, 網頁的每一個請求都是HTTP (圖片, CSS等), 而打開HTTP 請求是要先建立TCP 連接, 而如果一個頁面每個請求都要打開及關閉一個TCP 連接就會做成資源的浪費. keepalive_timeout 就是當一個HTTP 請求完成, 其TCP 連接會存留下來的時間, 如果這時有另一個HTTP 請求過來, 會複用這個TCP 連接, 如果再沒有新的請求過來, 才會關閉其TCP連接
user nginx;
worker_processes 1;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;
events {
worker_connections 1024;
}
http {
include /etc/nginx/mime.types;
default_type application/octet-stream;
log_format main '$remote_addr - $remote_user [$time_local] "$request" '
'$status $body_bytes_sent "$http_referer" '
'"$http_user_agent" "$http_x_forwarded_for"';
access_log /var/log/nginx/access.log main;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout 65;
client_max_body_size 8192m;
#gzip on;
#include /etc/nginx/conf.d/*.conf;
server {
listen 80 so_keepalive=30m::;
listen 443 default ssl;
ssl_certificate /etc/nginx/ssl/server.crt;
ssl_certificate_key /etc/nginx/ssl/portalkey.key;
#ssl_password_file /etc/nginx/ssl/ssl.pass;
ssl_session_timeout 5m;
ssl_protocols SSLv2 SSLv3 TLSv1;
ssl_ciphers HIGH:!aNULL:!MD5;
ssl_prefer_server_ciphers on;
location / {
proxy_request_buffering off;
proxy_pass http://127.0.0.1:8011/;
proxy_connect_timeout 180;
proxy_send_timeout 180;
proxy_read_timeout 180;
send_timeout 180;
}
location /test1_url/ {
proxy_pass http://127.0.0.1:8008/;
proxy_connect_timeout 180;
proxy_send_timeout 180;
proxy_read_timeout 180;
send_timeout 180;
}
location /test2_url/ {
proxy_pass http://127.0.0.1:3000/;
proxy_connect_timeout 180;
proxy_send_timeout 180;
proxy_read_timeout 180;
send_timeout 180;
}
}
}
# 配置段: http,默認75s
keepalive_timeout 60;
- send_timeout :發送數據至客戶端超時, 默認60s, 如果連續的60s內客戶端沒有收到1個字節, 連接關閉
- proxy_connect_timeout: nginx與upstream server的連接超時時間
- proxy_read_timeout: nginx接收upstream server數據超時, 默認60s, 如果連續的60s內沒有收到1個字節, 連接關閉
- proxy_send_timeout: nginx發送數據至upstream server超時, 默認60s, 如果連續的60s內沒有發送1個字節, 連接關閉
so_timeout:
當用戶跟SERVER開啟了TCP CONNECTION --> 一段長時間這個CONNECTION 沒traffic (so_keepalive timeout) --> SERVER 發出探測包看用戶是否還存在 --> 若探測包沒回, 則關閉TCP CONNECTION
so_keepalive=on|off|[keepidle]:[keepintvl]:[keepcnt]
so_keepalive=30m::10
will set the idle timeout (TCP_KEEPIDLE) to 30 minutes, leave the probe interval (TCP_KEEPINTVL) at its system default, and set the probes count (TCP_KEEPCNT) to 10 probes.
以上三個參數只能使用一個,不能同時使用, 比如so_keepalive=on, so_keepalive=off或者so_keepalive=30s::(表示等待30s沒有數據報文發送探測報文)